Android

public override View GetChildView(int groupPosition, int childPosition, bool isLastChild, View convertView, ViewGroup parent)
 {
     if (convertView == null)
     {
         convertView = _context.LayoutInflater.Inflate(Resource.Layout.ListItemCustomLayout, null);
     }

     var button = (Button)convertView.FindViewById(Resource.Id.HelloWorld);
     button.SetFocusable(ViewFocusability.NotFocusable);

     button.Click += (sender, e) =>
     {
         var groupName = ((Models.Timer)(((JavaObjectWrapper<Models.Timer>)GetChild(groupPosition, childPosition)).Obj)).GroupName;
         Toast.MakeText(_context, groupName, ToastLength.Long).Show();
     };

     return convertView;
 }

 implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support:design:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation project(':library')
    implementation 'de.hdodenhof:circleimageview:2.0.0'
    implementation 'com.android.support:cardview-v7:26.1.0'
    // JSON Parsing
    implementation 'com.google.code.gson:gson:2.6.1'
    implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
    implementation 'com.google.android.gms:play-services-ads:15.0.1'
    implementation 'com.google.android.gms:play-services:16.0.0'
    compile 'com.google.maps.android:android-maps-utils:'
    implementation 'org.apache.httpcomponents:httpcore:4.4.1'
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.google.firebase:firebase-core:15.0.1'
    implementation 'com.google.firebase:firebase-messaging:10.2.1'
    implementation 'com.facebook.android:account-kit-sdk:4.+'
    compile 'com.google.android.gms:play-services-ads:9.0.0'
    compile 'com.google.android.gms:play-services-analytics:9.0.0'
}
apply plugin: 'com.google.gms.google-services'
allprojects
        {
            repositories
                    {
                        jcenter()
                        google()
                    }

Error:(53, 13) Failed to resolve: com.google.maps.android:android-maps-utils:
<a href="openFile:/Users/vctroid/Desktop/vcare/app/build.gradle">Show in File</a>

Error:(52, 20) Failed to resolve: com.google.android.gms:play-services:16.0.0
<a href="install.m2.repo">Install Repository and sync project</a><br><a href="openFile:/Users/vctroid/Desktop/vcare/app/build.gradle">Show in File</a><br><a href="open.dependency.in.project.structure">Show in Project Structure dialog</a>

Error:(56, 20) Failed to resolve: com.google.firebase:firebase-core:15.0.1
<a href="openFile:/Users/vctroid/Desktop/vcare/app/build.gradle">Show in File</a><br><a href="open.dependency.in.project.structure">Show in Project Structure dialog</a>

com.android.tools.idea.gradle.structure.editors.ModuleDependenciesTableItem@5a4a24e3	Implementation

<?xml version="1.0" encoding="utf-8"?>
<ScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"

        android:layout_height="wrap_content">


        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <android.support.design.widget.TextInputLayout
                android:id="@+id/textInputLayout2"
                android:layout_width="377dp"
                android:layout_height="64dp"
                android:layout_marginBottom="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                app:layout_constraintBottom_toTopOf="@+id/textView10"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent">

                <android.support.design.widget.TextInputEditText
                    android:layout_width="383dp"
                    android:layout_height="wrap_content"
                    android:hint="FIRST  NAME" />
            </android.support.design.widget.TextInputLayout>

            <android.support.design.widget.TextInputLayout
                android:id="@+id/textInputLayout"
                android:layout_width="374dp"
                android:layout_height="51dp"
                android:layout_marginBottom="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                app:layout_constraintBottom_toTopOf="@+id/textView11"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent">

                <android.support.design.widget.TextInputEditText
                    android:layout_width="384dp"
                    android:layout_height="46dp"
                    android:hint="LAST NAME" />
            </android.support.design.widget.TextInputLayout>

            <android.support.design.widget.TextInputLayout
                android:id="@+id/textInputLayout3"
                android:layout_width="384dp"
                android:layout_height="58dp"
                android:layout_marginBottom="8dp"
                android:layout_marginEnd="8dp"
                app:layout_constraintBottom_toTopOf="@+id/textView12"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent">

                <EditText
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:hint="you@domain.com" />
            </android.support.design.widget.TextInputLayout>

            <TextView
                android:id="@+id/textView"
                android:layout_width="381dp"
                android:layout_height="45dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:text="FIRST NAME"
                android:textColor="#FF00"
                android:textColorHighlight="?attr/colorBackgroundFloating"
                android:textColorLink="?android:attr/colorLongPressedHighlight"
                app:layout_constraintBottom_toTopOf="@+id/textInputLayout2"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.461"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.727" />

            <TextView
                android:id="@+id/textView10"
                android:layout_width="372dp"
                android:layout_height="34dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:text="LAST NAME"
                android:textColor="#FF00"
                app:layout_constraintBottom_toTopOf="@+id/textInputLayout"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent" />

            <TextView
                android:id="@+id/textView11"
                android:layout_width="377dp"
                android:layout_height="37dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:text="EMAIL"
                android:textColor="#FF00"
                app:layout_constraintBottom_toTopOf="@+id/textInputLayout3"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent" />

            <TextView
                android:id="@+id/textView12"
                android:layout_width="376dp"
                android:layout_height="41dp"
                android:layout_marginBottom="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:text="PASSWORD"
                android:textColor="@color/pink"
                app:layout_constraintBottom_toTopOf="@+id/textInputLayout4"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent" />

            <android.support.design.widget.TextInputLayout
                android:id="@+id/textInputLayout4"
                android:layout_width="376dp"
                android:layout_height="57dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                tools:layout_editor_absoluteY="381dp">

                <android.support.design.widget.TextInputEditText
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:hint="create a new password" />
            </android.support.design.widget.TextInputLayout>

            <Button
                android:id="@+id/button4"
                android:layout_width="160dp"
                android:layout_height="50dp"
                android:background="@color/blue"
                android:text="SIGNUP"
                android:textColor="?android:attr/colorLongPressedHighlight"
                tools:layout_editor_absoluteX="108dp"
                tools:layout_editor_absoluteY="540dp" />


            <CheckBox
                android:id="@+id/checkBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:text="I certify that I am 18 years of age or older, I agree of age of older, I agree to the User Agreement  and acknowledge the privacy Policy "
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.571"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/textInputLayout4" />

        </RelativeLayout>
    </LinearLayout>

</ScrollView>